649153801667690 has 128 divisors (see below), whose sum is σ = 1354337967640320. Its totient is φ = 221749407129600.

The previous prime is 649153801667687. The next prime is 649153801667863. The reversal of 649153801667690 is 96766108351946.

It is a super-2 number, since 2×649153801667690² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5268915629 + ... + 5269038831.

It is an arithmetic number, because the mean of its divisors is an integer number (10580765372190).

Almost surely, 2^{649153801667690} is an apocalyptic number.

649153801667690 is an abundant number, since it is smaller than the sum of its proper divisors (705184165972630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649153801667690 is a wasteful number, since it uses less digits than its factorization.

649153801667690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167928.

The product of its (nonzero) digits is 352719360, while the sum is 71.

The spelling of 649153801667690 in words is "six hundred forty-nine trillion, one hundred fifty-three billion, eight hundred one million, six hundred sixty-seven thousand, six hundred ninety".